Linked by Thom Holwerda on Thu 7th May 2009 18:01 UTC
Windows Windows XP Mode, the virtualisation tool currently in beta for Windows 7, only works on processors with virtualisation extensions, known as AMD-V and Intel VT-x. Microsoft made this clear from the get-go, but still various news websites regurgitated it as "news" yesterday that some Intel processors do not support XPM. Twenty-four hours down the road, and Intel had a few things to say about this.
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RE[2]: Comment by Kroc
by Drumhellar on Thu 7th May 2009 19:32 UTC in reply to "RE: Comment by Kroc"
Drumhellar
Member since:
2005-07-12

Essentially this was just a quick way for MS to get virtualization in the OS pretty fast.


This is how it breaks down:

AMD-V/VT-x: Generally slowest, but very stable, especially when the guest uses wierd processor features.

Software: Faster, not as stable. Wierd processor stuff can crash the guest.

AMD-V/VT-x + nested page tables: Faster than software, as stable as hardware. The first chips with AMD-V/VT-x didn't support NPT, but later ones.

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